Fiona said this most recent case, involving a 6-year-old boy in Dublin, is particularly distressing as she has access to pictures of the boy showing increasing signs of deterioration.

She said: "A man living in Dublin is giving this product to his son from nearly four years. He is a member of a Facebook group which supports this Miracle Mineral Cure.

"He is also giving his son, GcMAF which is a blood-based product and is also completely banned.

"I discovered him just a few days ago when he made a comment in this group that he was concerned about how he was going to mix the GcMAF with the bleach.

"The child looks terrible. In other post he's talked about the child vomiting and losing weight."

She has found posts indicating the 6-year-old has been dosed with the bleach product since 2014. The posts appear to be from a person claiming to have administered products to a child.

One of the first Facebook posts regarding the boy's health during the 'treatment'

According to Fiona, the products, if used consistently, burns the child's insides and they pass intestinal tissue.

Once the child passes this tissue, the members of the pro-CD/MMS groups take pictures of it to display. Some refer to it as the 'catch of the day' as they believe it signifies the child is ridding their body of the 'illness'.

Fiona said: "It's such vile abuse, they think that the tissue is worms and parasites coming out and they want to celebrate that, even though their child is in utter agony.

"It's horrific."

Fiona argues that this is happening all too frequently in Ireland and across the globe. She has cited Galway and Mayo as two counties in Ireland where the most amount of these cases nationally appear to occur.

She says she has been trying to highlight this issue for the past four and a half years, but she believes ​not enough is being done by the authorities to combat the numbers of families using these products on children and in some cases, adults.

Fiona said: "I reported this case to gardai today and I reported it TUSLA, as well. But these incidents aren't being checked out straight away. What I want to see, is this boy removed from his home and examined. He needs his bloods checked out to see what state his insides are in."

"One of the women I reported three years ago, I discovered that she's still using it just two months ago. I couldn't believe it."

Autism rights campaigner, Fiona O'Leary

The concerned mother said something more needs to be done to protect the children who have been subjected to this substance abuse for years.

She said: "This particular Facebook group . . . is just one group of many."